On 11/02/11 20:26, Tijd Dingen wrote:
Wavecrest just fell of the Internet for some time and then eventually
re-appeared as GigaMax. All material quite
obvious just changed company name and logo. A few things was cleaned out.
Haven't checked since.
I would think they had financial problems and
- Original Message
From: Magnus Danielson
To: time-nuts@febo.com
Sent: Wed, February 9, 2011 10:08:40 PM
Subject: Re: [time-nuts] Calculate spectral content from a series of zero
crossing time stamps?
> Wavecrest just fell of the Internet for some time and then eventually
On 10/02/11 06:13, jimlux wrote:
On 2/9/11 2:08 PM, Tijd Dingen wrote:
The autocorrelation processing is O(N^2) while the DFT can be done in
O(N log N) when using FFT. As usual these can be implemented in reversed
order such that first the FFT is done to the phase jitter and
auto-correlation
LeCroy has a paper with a short explanation that I found useful:
http://www.lecroy.com/files/WhitePapers/WP_TechBrief_Var_of_Time.pdf
This look to me very similar to this:
http://pstca.com/sampler/index.htm
- Henry
--
ehydra.dyndns.info
___
time-nu
On 2/9/11 2:08 PM, Tijd Dingen wrote:
The autocorrelation processing is O(N^2) while the DFT can be done in
O(N log N) when using FFT. As usual these can be implemented in reversed
order such that first the FFT is done to the phase jitter and auto-correlation
can be found using O(N) post-proce
On 09/02/11 23:08, Tijd Dingen wrote:
Henk wrote:
Wavecrest uses algorithms for this and their software gives a spectrum.
They also give some info on their site.
Henk, the paper you mentioned put me on the right track. Thanks. :)
Magnus wrote:
In "Jitter, Noise and Signal Integrity at High-
Henk wrote:
> > Wavecrest uses algorithms for this and their software gives a spectrum.
> > They also give some info on their site.
Henk, the paper you mentioned put me on the right track. Thanks. :)
Magnus wrote:
> In "Jitter, Noise and Signal Integrity at High-Speed" by Mike Peng Li,
> Prentic
On 09/02/11 19:11, Henk wrote:
Hi Fred,
"A METHOD OF SERIAL DATA JITTER ANALYSIS USING ONE-SHOT TIME INTERVAL
MEASUREMENTS" is in the white paper section of GigaMax 'tecnical resources'.
They split GigaMax from Wavecrest, probably after some bad financial times. The
Wavecrest white papers are
Hi Henk,
On 08/02/11 22:19, Henk wrote:
Hi,
Wavecrest uses algorithms for this and their software gives a spectrum. They
also give some info on their site.
In "Jitter, Noise and Signal Integrity at High-Speed" by Mike Peng Li,
Prentice Hall, ISBN 0-13-242961-6 it is covered in pages 200-207
igaMax.
Henk
Op 9 feb 2011, om 12:31 heeft Tijd Dingen het volgende geschreven:
>
>
>
>
> - Original Message
> From: Henk
> To: Discussion of precise time and frequency measurement
> Sent: Tue, February 8, 2011 10:19:38 PM
> Subject: Re: [time-nuts] C
On 2/9/11 3:17 AM, Tijd Dingen wrote:
(if you want some ancient FORTRAN IV code for this, I've probably got a listing
in a box out in the garage from the 70s)
Does this box also happen to contain verilog code for it?
I don't think Verilog was even a gleam in the inventors' eyes back in
t
- Original Message
From: Henk
To: Discussion of precise time and frequency measurement
Sent: Tue, February 8, 2011 10:19:38 PM
Subject: Re: [time-nuts] Calculate spectral content from a series of zero
crossing time stamps?
> Wavecrest uses algorithms for this and their softw
- Original Message
From: jimlux
To: time-nuts@febo.com
Sent: Tue, February 8, 2011 4:00:43 PM
Subject: Re: [time-nuts] Calculate spectral content from a series of zero
crossing time stamps?
> The Chirp-z transform (Bluestein) is also useful when you want a small range
&
Hi,
Wavecrest uses algorithms for this and their software gives a spectrum. They
also give some info on their site.
Henk
Op 8 feb 2011, om 20:51 heeft detlef.amb...@gmx.de het volgende geschreven:
> 08.02.2011 08:17, Poul-Henning Kamp:
>> In message <224676.41616...@web120905.mail.ne1.yahoo.c
08.02.2011 08:17, Poul-Henning Kamp:
> In message <224676.41616...@web120905.mail.ne1.yahoo.com>, Tijd Dingen writes:
>
>> >From what I could find so far, one method to go about this is use a
>> Lomb/Scargle Periodogram. And specifically the method by Press & Rybicki that
>> extirpolates the uneve
On 2/8/11 6:32 AM, Mark Kahrs wrote:
The Goertzel algorithm is only useful when you want a few frequences
(i.e., it evaluates specific frequencies on the unit circle). For
general all purpose slicing and dicing, the FFT is what you want. See
the ancient book by Rabiner for the details.
The C
The Goertzel algorithm is only useful when you want a few frequences
(i.e., it evaluates specific frequencies on the unit circle). For
general all purpose slicing and dicing, the FFT is what you want. See
the ancient book by Rabiner for the details.
On Tue, Feb 8, 2011 at 3:14 AM, Tijd Dingen w
> > From what I could find so far, one method to go about this is use a
> > Lomb/Scargle Periodogram. And specifically the method by Press & Rybicki
> > that extirpolates the unevenly timed samples to an regular timed mesh,
> > after which a regular DFT is done.
> Just knowing the time of the ze
In message <224676.41616...@web120905.mail.ne1.yahoo.com>, Tijd Dingen writes:
>>From what I could find so far, one method to go about this is use a
>Lomb/Scargle Periodogram. And specifically the method by Press & Rybicki that
>extirpolates the unevenly timed samples to an regular timed mesh, aft
Subject: [time-nuts] Calculate spectral content from a series of zero crossing
time stamps?
Consider the following scenario. We have a signal source of about 10 kHz,
with unknown phase noise. Let's for simplicity's sake assume for now that
the phase noise is large enough that it will be
Consider the following scenario. We have a signal source of about 10 kHz,
with unknown phase noise. Let's for simplicity's sake assume for now that
the phase noise is large enough that it will be detectable by the following
approach.
We measure every zero crossing with lets say 1 ns accuracy. So
21 matches
Mail list logo
